Can't find any info on them. I see that the 47TX and 49TX use Burr-Browns, but no info on the 45TX. I already have the 45TX on the way, but I'm already worried about the sound. I'm currently on a Pioneer VSX-D811S and I don't like the sound very much. BTW, this is my 6th receiver in about an 8 month span...is there something wrong with me?